What is the balanced equation when Pb(NO3)2 NaL reacts with PbL2 NaNO3?

The balanced equation for the reaction between lead(II) nitrate (Pb(NO3)2) and sodium iodide (NaI) to form lead(II) iodide (PbI2) and sodium nitrate (NaNO3) is:

Pb(NO3)2 + 2NaI -> PbI2 + 2NaNO3